On 22 Dec 2018 10:53:49 +0000 (GMT)
Theo  wrote:

>A. Dumas  wrote:
>> Theo  wrote:
>> > There's a variety of firmware for running such controllers on Arduino and
>> > similar, doing closed loop control.
>>
>> ###>>>>> "as this is Raspberry newsgroup" <<<<<###
>
>Yes, and?  You attach the Arduino to the Pi and communicate over USB or
>serial (subject to voltage levels).  You don't want to do realtime control
>on a Pi running Linux, but a $3 Arduino is a suitable coprocessor for the job.
>
>Theo

Well even without that, a pair of these:
https://uk.rs-online.com/web/p/motor-driver-ics/9062978/

will do the job with just 4 GPIO lines from the Pi

Or with the simplest of wiring, just one with 2 GPIOs :)

Been there, done that, got the T shirt - but was using the userport from a BBC
Model B + 2 741s and 4 transistors :)


--
W J G

--- SoupGate-Win32 v1.05